小賴的實戰記錄

             DBCollection collection = db.getCollection(collection_name);
             BasicDBObject query = new BasicDBObject();
             query.put("_id",_id);

             BasicDBObject pid_query = new BasicDBObject();
             child_query.put("child_id",child_id);

             BasicDBObject inbox_query = new BasicDBObject();
             childs_query.put("$elemMatch",child_query);

             query.put("childs",childs_query);

             BasicDBObject update_object = new BasicDBObject();

             BasicDBObject update_data = new BasicDBObject();
             update_data.put("childs.$."+status,status_value);
             update_object.put("$set",update_data);

             collection.update(query,update_object);